Bad Piggies Tusk ‘Til Dawn Bonus Level 5-II (5-2) can be 3-starred using a single contraption. Build a 2 x 2 steel contraption with four wheels — two on top, and two on bottom. Now place a pig in the left box and a pumpkin in the right. Note, the rope is truly unnecessary for this level, so that star is given for free!
If you have a different strategy for completing this level feel free to leave a comment below.